David G. Parker

Mechanism of methanol synthesis from CO2/CO/H2 mixtures over copper/zinc oxide/alumina catalysts: use of14C-labelled reactants

Abstract The addition of 14 CO or 14 CO 2 tracers to CO 2 /CO/H 2 reactant mixtures for methanol synthesis over a commercial copper/zinc oxide/alumina catalyst was used to determine the origin of the carbon in the product. For PCO 2 /PCO ratios from 0.02 to 1 the fraction of methanol made from carbon dioxide rises from ∼0.7 to ∼1, so carbon dioxide is the major reactant under industrial conditions. There is no carbon-containing surface intermediate common to methanol synthesis and the water-gas shift reaction.

Toluene methylation over ici zeolite fu-1

Abstract Toluene methylation over the ICI zeolite Fu-1 is described. Using variously calcined and ion exchanged samples, it is demonstrated that the pore size constraint of Fu-1 is such that the toluene methylation reaction occurs exclusively on the outer surface.